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BURRCUGHS BnACnfoF weerA MnrnDnN,A CONNECTICUT.-

Lesm Pare@ No. 61,505, lated January 29,1867'.

'IMPROvED sass rAsTEN-sii.

To ALL` WHCM 15p MAY ooNCnRN:

' Be it known that I, BU'RROUGHS BE AGH,-of .West Meriden, 'in the county of `New Haven, and State of'Connecticut, have invented a new `improvement in-Window Spring; and I do hereby declare the following, when taken in connection with the accompanying drawings, and the letters of reference marked thereon, to he a full, clear, and exact description of the same, and which said drawings constitute part of this speciiication, and represent in l Figures 1, 2,'and 8, a side view, one of the plates removed to showthe mechanism audits operation; and in Figure 4, an edge view.

This invention relates'to a'spring or catch set int'o the jamb of the window frame, to sustain and lock the sash in any desired'position, and consists in. the peculiar man-ner ofA operating the cam,A and also in an arrangement for locking the cam, when the'sash is in any desiredposition, so-that it cannotl bep-moved up lor down.

To enable others to construct anduse my improvement, I.will proceed to describe. the same as illustrated in' the accompanying drawings. i i v Y v A is the sash; B, the jamb of the frame, of common construction; C, the face-plate of the case/'which contains the mechanism; D, the cam, pivote'd` in the case at q; E, the operating lever, also pivoted i-n the case at d. The face oi the cam D -is serrated, (as see figs. 1 and 4,) and its inner end extended beyond the bearing to form a lever, F, and the lever E protrudesthrough the case andframe, so as lto form a handle by-'which -to operate the cam. Its inner end is extended beyond the i'ulcrum d, to force the shorter ,arm I of the lever to Abear upon the arm' F oi' the cam, as seen in iig. 1'. l spiral spring, L, arranged within the case, tends to press the cam downward, as in fig. l, but not so as to create great resistance to the raising of the sash, but so that the sash may be freely raised, and yetso that when the power which raised the sash'is removed the face of the cam bearing against 7the sash, andits position relative to the fulcrum a, issuch as to prevent the descent of the sash. To lower' the sash,iraise the lever E,`asdenoted in iig. 2; the arm I of the lever hears upon the arm'F of the cam, and `raises the cam from the position in fig. 1 to that in iig. 2; andwhen the sashiis lowered to the ,desired position, release the lever E, and the cam vwill spring Idown against and retain the sash inv that position.

To lock the cam in any desired position,IV form notches,`e, uponA its back side, as seen in figs. 1 2, and 3, and upon the side of the lever E I form a lip or projectiomf, denoted in broken lines, and so that when the sash is in the position to be locked, press the lever E down,-as denoted in tig. 3, to force the lip'f in toveither ofl the notches c, andwhile in that position, as seen in 3, the cam cannot be moved, andA consequently the sash is held rmlyin that position. The cam is provided with several notches to adjust itself` to more or less` play between the sashand the j'amb.

I do lnot broadly claim a cam Aarranged to retain the sash in' any desired'positiom'and so thatA the sash may he raised without operating upon the ca-m, 'as such is common and well known; but having .thus fully described my invention, what Idoclaim as new and useful, and desire to secure/by Letters Patent"`1s 1. The combination of the lever E and the' cam D, constructed respectively Witharms I and F, and 505,5 to operate substantially inthe manner described.l

2. I claim the combination of' the lever E and cam D, when-constructed with the lip f and the notches @,I

so as to operate to lock the cam, substantially in the manner described.

BRROUGHS BEACH.

Witnesses z. v

JOHN H. SHUMWAY, AL'rsrn J. Tissus. 

